Pen



FIG. 1 is a perspective view of a pen in accordance with my new design;

FIG. 2 is a front view of the pen in FIG. 1;

FIG. 3 is a rear view of the pen in FIG. 1;

FIG. 4 is a left side view of the pen in FIG. 1;

FIG. 5 is a right side view of the pen in FIG. 1;

FIG. 6 is an enlarged top view of the pen in FIG. 1; and,

FIG. 7 is an enlarged bottom view of the pen in FIG. 1; wherein the stippling shown on the grip of the pen barrel represents a surface texture. 

The ornamental design for a pen, as shown and described. 